3420378021 has 8 divisors (see below), whose sum is σ = 4571878464. Its totient is φ = 2274564800.

The previous prime is 3420378007. The next prime is 3420378023. The reversal of 3420378021 is 1208730243.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3420378021 - 2⁷ = 3420377893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3420378021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420378023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420401 + ... + 1422806.

It is an arithmetic number, because the mean of its divisors is an integer number (571484808).

Almost surely, 2^3420378021 is an apocalyptic number.

It is an amenable number.

3420378021 is a deficient number, since it is larger than the sum of its proper divisors (1151500443).

3420378021 is a wasteful number, since it uses less digits than its factorization.

3420378021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843611.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 3420378021 is about 58483.9979909035. The cubic root of 3420378021 is about 1506.6927633107.

The spelling of 3420378021 in words is "three billion, four hundred twenty million, three hundred seventy-eight thousand, twenty-one".